Questions & Answers about Моя тётя живёт в этом доме уже тридцать лет.
Russian does not have a separate present perfect tense. To express “has been living” or “has lived (and still lives)”, Russian normally uses:
- Present tense of an imperfective verb + time expression
So Моя тётя живёт в этом доме уже тридцать лет literally is “My aunt lives in this house already thirty years”, but in English we translate it as “has lived / has been living”.
If you said:
- Моя тётя жила в этом доме тридцать лет.
→ She lived in this house for thirty years (implies this is in the past; she probably no longer lives there).
So живёт focuses on an ongoing situation that started in the past and continues now.